package com.yyh.myblog.web.admin;

import com.yyh.myblog.entity.Tag;
import com.yyh.myblog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

/**
 * @author yyh
 * @date 2021/2/23 18:06
 * 页面分页处理控制器
 * 页面跳转控制
 */
@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;
    /**
     * 页面分页处理方法
     * 其中@PageableDefault可对页面显示数量、排序进行处理
     * @param pageable
     * @param model
     * @return 分类页面
     */
    @GetMapping("/tags")
    public String tags(@PageableDefault(size = 6,sort = {"id"},direction = Sort.Direction.DESC)
                                    Pageable pageable, Model model){
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }

    @GetMapping("/tags/input")
    public String input(Model model) {
        //利用model赋予前端Tag值保证前端错误提示可从tag获取name值注释可用
        model.addAttribute("tag", new Tag());
        return "admin/tags-input";
    }

    @GetMapping("/tags/{id}/input")
    public String  editInput(@PathVariable Long id, Model model) {
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-input";
    }

    @PostMapping("/tags")
    public String post(@Valid Tag tag ,
                       BindingResult result ,
                       RedirectAttributes attributes) {
        Tag tag1 = tagService.getTagByName(tag.getName());
        if (tag1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        if (result.hasErrors()) {
            return "admin/tags-input";
        }
        Tag t = tagService.saveTag(tag);
        if(t == null){
            attributes.addFlashAttribute("message","新增失败");
        }else {
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/tags";
    }

    @PostMapping("/tags/{id}")
    public String editPost(@Valid Tag tag,
                           BindingResult result,
                           @PathVariable Long id,
                           RedirectAttributes attributes) {
        Tag tag1 = tagService.getTagByName(tag.getName());
        if (tag1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        if (result.hasErrors()) {
            return "admin/tags-input";
        }
        Tag t = tagService.updateTag(id,tag);
        if(t == null){
            attributes.addFlashAttribute("message","更新失败");
        }else {
            attributes.addFlashAttribute("message","更新成功");
        }
        return "redirect:/admin/tags";
    }

    @GetMapping("/tags/{id}/delete")
    public String delete(@PathVariable Long id, RedirectAttributes attributes) {
        tagService.deleteTag(id);
        attributes.addFlashAttribute("message","成功删除");
        return "redirect:/admin/tags";
    }

}
